1. someone beat at the door some minutes ago.
anyone didn't beat at the door.
did anyone beat at the door?
2. my brother became a professional photographer.
my brother didn't become a professional photographer.
did your brother became a professional photographer?
3. we began our work.
we didn't begin our work.
did we begin our work?
4. my younger sister broke my headphones.
my younger sister didn't broke anything.
did my younger sister broke anything?
5. they built that house yesterday.
they didn't build that house yesterday.
did they build that house yesterday?
6. he bought a new computer last week.
he didn't buy a computer last week.
did he buy a computer last week?
